Arduino Code

I have a circuit of 4 buttons and want the user to have to press them in a certain order to light a green LED. Any incorrect button press would need to reset the sequence in memory. Pressing an incorrect sequence of 4 would light a red LED.

ie. the correct sequence is red, yellow, blue, green. The user presses red, blue, green, green. The red LED lights. The player presses green, blue but then realises a mistake has been made. They then press red, yellow, blue, green and the green LED lights up.